scholarly journals Parameter Characterization in Processing of Silver – Aluminum Based Electrical Contact Materials

2017 ◽  
Vol 62 (3) ◽  
pp. 1895-1901 ◽  
Author(s):  
S. Praveen Kumar ◽  
R. Parameshwaran ◽  
A. Ananthi ◽  
J. Jenil Jaba Sam
Keyword(s):  
Powder Metallurgy ◽  
Tin Oxide ◽  
Electrical Contact ◽  
Cadmium Oxide ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Vital Role ◽  
Contact Materials ◽  
Potential Applications ◽  
Electrical Contact Materials

AbstractAn electrical contractor is one which plays significant role in day todays life in industries as well as in home appliances. In current scenario the materials for conducting purpose has an overwhelming research capability. Now a day the silver based electrical contact composite material have provided the potential applications in aerospace and automobile industries. Among silver based contact material the silver cadmium oxide and silver tin oxide plays a vital role in fabrication of electrical contactors. In this research an attempt has been made to study the influence of adding Aluminum with silver based electrical contact composite materials by two different processing routes namely stir-casting and powder metallurgy. Silver and aluminum matrix plays a virtual role in composite world owing to their highest conductivity. Optimum parameters were identified for attaining the maximum properties such as conductivity, hardness, density, and porosity of composition. By this better conducting property and mechanical property of the electrical contact can be improved by this system. Thus a screening test has be conducted with addition of Al with silver tin oxide compositions hence this paper aims to process the aluminum - silver based electrical contact materials by stir casting processing and powder metallurgy route and compare the results obtained.

The effects of citric acid on the synthesis and performance of silver–tin oxide electrical contact materials

2014 ◽  
Vol 588 ◽  
pp. 30-35 ◽  
Author(s):  
Zhijie Lin ◽  
Shaohong Liu ◽  
Xudong Sun ◽  
Ming Xie ◽  
Jiguang Li ◽  
...  
Keyword(s):  
Citric Acid ◽  
Tin Oxide ◽  
Electrical Contact ◽  
Contact Materials ◽  
Electrical Contact Materials ◽  
And Performance

Copper-Based Electronic Materials Prepared by SPS and their Properties

2010 ◽  
Vol 97-101 ◽  
pp. 1730-1735
Author(s):  
Zhong Quan Guo ◽  
Hao Ran Geng ◽  
Bao Chuan Sun
Keyword(s):  
Powder Metallurgy ◽  
Electronic Materials ◽  
Electrical Contact ◽  
Compression Force ◽  
Contact Materials ◽  
Comprehensive Properties ◽  
Sintering Time ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Electrical Contact Materials

Copper-based electrical contact materials were prepared by Spark Plasma Sintering (SPS) method and powder metallurgy with the addition of different proportions of rare earth (RE) element. It is found that SPS method greatly enhances the density, hardness and conductivity of the composite materials, thus improving their comprehensive properties. Compared with powder metallurgy, SPS boasts a shorter sintering time, smaller compression force and higher efficiency. RE has considerable influence on the comprehensive properties of copper-based electrical contact materials. When the content of RE lower than 0.1%, the comprehensive properties can be improved by increasing RE.

scholarly journals High Oxidation Resistance of CVD Graphene-Reinforced Copper Matrix Composites

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 498 ◽  
Author(s):  
Mingliang Wu ◽  
Baosen Hou ◽  
Shengcheng Shu ◽  
Ao Li ◽  
Qi Geng ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Oxidation Resistance ◽  
Electrical Contact ◽  
Chemical Vapor ◽  
Surface Oxidation ◽  
Copper Matrix ◽  
Contact Materials ◽  
Graphene Layers ◽  
Electrical Contact Materials ◽  
Pure Cu

Copper-based materials are common industrial products which have been broadly applied to the fields of powder metallurgy, electrical contact, and heat exchangers, etc. However, the ease of surface oxidation limits the durability and effectiveness of copper-based components. Here, we have developed a powder metallurgy process to fabricate graphene/copper composites using copper powders which were first deposited with graphene layers by thermal chemical vapor deposition (CVD). The graphene/copper composites embedded with an interconnected graphene network was then able to be obtained by vacuum hot-pressing. After thermal oxidation (up to 220 °C) in humid air for several hours, we found that the degree of surface oxidation of our samples was much less than that of their pure Cu counterpart and our samples produced a much smaller increase of interfacial contact resistance when used as electrical contact materials. As a result, our graphene/copper composites showed a significant enhancement of oxidation resistance ability (≈5.6 times) compared to their pure Cu counterpart, thus offering potential applications as novel electrical contact materials.

Research Progress in Silver Zinc Oxide Electrical Contact Material

2021 ◽  
Vol 1036 ◽  
pp. 77-90
Author(s):  
Shang Qiang Zhao ◽  
Ming Xie ◽  
Ji Heng Fang ◽  
Yong Tai Chen ◽  
Sai Bei Wang
Keyword(s):  
Zinc Oxide ◽  
Failure Mechanism ◽  
Rapid Development ◽  
Electrical Contact ◽  
Cadmium Oxide ◽  
Research Progress ◽  
Contact Material ◽  
Contact Materials ◽  
Electrical Contact Material ◽  
Electrical Contact Materials

Since the performance of silver metal oxide (Ag/MeO) electrical contact materials directly affects the reliability and service life of switching apparatus, the related research on high-performance Ag/MeO electrical contact materials has not stopped. And with the rapid development of switching apparatus, higher and higher requirements are put forward for the performance of Ag/MeO electrical contact materials. Thanks to low and stable contact resistance, short arc burning time, good resistance to high current impulse (3000-5000 A) and good anti-arc erosion, silver zinc oxide (Ag/ZnO) more than just serves as an indispensable environmentally friendly alternative to silver cadmium oxide (Ag/CdO) electrical contact material, and has become one of the important research hotspots of Ag/MeO in recent years. Nevertheless, Ag/ZnO is suffering the increasingly serious challenges, especially the poor processability and electrical properties due to the easy segregation of zinc oxide (ZnO) during the process of preparation, which urge scholars at home and abroad to seek favorable methods to optimize the Ag/ZnO. As yet, impressive strides have been made in optimization the preparation process, nano-technology and additive modification of materials, and research on the failure mechanism of materials. Aiming to provide reference for optimizing Ag/ZnO electrical contact material, this review retrospects the research progress in Ag/ZnO electrical contact materials in recent years, and expounds the preparation methods, processing technology, modification research and failure mechanism of Ag/ZnO, and points out the future development directions of Ag/ZnO.

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